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(No Model.) 3 Sheets-Sheet 1. P. REILLY. TUBULAR STEAM GENERATOR.

Patented Nov. 3, 1885.

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(No Model.) 3 Sheets-Sheet 2. P. REILLY. TUBULAR STEAM GENERATOR- Patented Nov. 3, 1885.

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(No Model.) s sheets-sheet 3. P. REILLY.

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N0.'329,678. Patented Nov. 3, 1885.

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UNITED STATES PATENT OFFICE.

PATRICK REILLY, OF BROOKLYN, NEW YORK.

TUBULAR STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 329,678. dated November 3, 1885.

Serial No. 174.195. (No model.)

To all whom t may concern:

Be it known that I, PATRICK REILLY, a citizen ofthe United States, residing at Brooklyn, county of Kings, State of New York, have invented certain new and useful lmprovements in Tubular Steam-Generators, of which the following is a specification.

The steam-generator forming the subject of this invention is of the same class as that described in my application for Letters Patent led July 20, 1885, under Serial No. 172,104,

and comprises a system of large pipes forming the main supporting-frame of the generator, and a system of small pipes or tubes connected to the upper and lower pipes of the main supporting-frame.

ln this invention all the steam-generating tubes follow one general design-viz, each has a single bend of about a right angle; they are connected together in sets by being secured at their ends in headers, and these headers are connected to the large pipes of the supporting-frame. By this arrangement great simplicity of construction is had, ample water and steam space and steam-generating capacity are provided, and the labor of cleaning the various parts greatly reduced, besides retaining all the advantages belonging to this class of steam-generators.

To describe my invention more particularly the accompanying drawings will now be referred to, in which- Figure 1, Sheet l, is a front elevation ofthe generator with the front plate of the casing removed; Fig. 2, Sheet 2, is a longitudinal section on the line x x, Fig. 1, and the line y y, Fig. 4. Fig. 3, Sheet l, is a plan View cut on the line z z, Fig. 2. Fig. 4, Sheet 2, is a 4 rear elevation with the back plate of the casing removed; and Figs. 5 and 6, Sheet 3, are views, respectively, similar to Figs. 1 and 2, of a modification.

The stand-pipes a o ai as, the lower horizontal water-pipes, b b b2 b3, the upper horizontal steam-pipes, c c c2 c3, and connectingbends d d d2 d3 are similar to the pipes correspondingly indicated by reference-letters in my before-mentioned application, so it is unnecessary here to particularly describe their construction and functions.

The steam-generating part of the boiler consists of the straight pipes or tubes e e', arranged vertically, and straight pipes or tubes jf, arranged about horizontally-that is, with a slight downward inclination from the front to the rear of the generator. Each one ofthe vertical tubes e e is, by means of an elbow or bend, gg', secured to an inclined tube, ff', thus forming independent steam-generating tubes having only one bend ofabout aright angle; and they are connected together in sets by the free ends of the parts ee being screwed into headers h h', and the free ends ofthe parts f f into headers v3 t, thus constituting sections of the generator. These headers are open at one end only. The parts e e have right and left v threads on their ends to permit of these sections or sets of tubes being readily put together. Said parts e e' are screwed into the bends g g and headers h h after the parts j' f', with the bends g g secured on their ends, have been screwed into the headers z' i. There may be any desired number of sections and of bent tubes in each section, according to the size of the generator. The headers h and 1l of one set of sections are secured in the main supporting-pipes, as shown-that is, the open ends of the headers h h are connected to sockets formed in the sides of the horizontal pipe b', and the headers i 'i are connected to sockets formed in the front stand-pipe, a, and the headers h and t of the other set of sections are similarly connected to the pipe b and stand-pipe a3. -All of these said connections are made by means of short connecting-pieces j and j', having right and left threads,which facilitates placing the diii'erent sections of tubesin proper position in the main frame; and to cause the bent tubes of each section to occupy a position opposite the spaces between the bent tubes of adjoining sections the alternate connecting-pieces j are made somewhat longer than the connecting-pieces j. rlhe furnace-bars k are of ordinary construction, and the wall k is built up so as to nearly reach the inclined tubes f f of the two lower sections, the vertical tubes e e of these sections being immediately behind the rear or bridge Wall. The inclined and Vertical tubes of each succeeding section have increased lengths, so that all the vertical tubes and all the inclined tubes of the various sections are about parallel, thus making it an easy matter to clean them, the soot, tc., being readily removed from the IOC soot-chamber Z through a door formed in the side wall of the casing m. A light wall may be built in this chamber Zto support the inner ends of the headers h h', as shown at Z, Fig. 3. The inner ends of the front headers, i z, are supported by resting on the projections i2 2, cast on or attached to the upper' side of each of the preceding or lower headers.

To provide for more heating-surface and increase the steam-generating capacity of the boiler, a series of tubes is located in a rear chamber, n, formed in the casing by the partition n,which extends down to within a short distance of the bottom, the due-opening cibeing at the upper end of the chamber n. These tubes in the chamber n embody the same principles of construction as the other steam-generating tubes-that is, they have right-angle bends and are connected together in sections, the vertical tubes o and obeing secured in headers p and p', and having bends q and q on their other ends, into which bends and the headers r r are screwed horizontal tubes s s. These sections of rightangled tubes are arranged transversely in the chamber n, and each of two sections in the same transverse plane are reversed in position, so as to fill, as nearly as possible, the whole of the chamber n, as shown at Fig. 4. The horizontal headers p and vertical header-s r are respectively connected to the short pipes b4 and b5, which are closed at their outer ends, and are connected at their inner ends to the main supportingpipes, the pipe b* to the stand-pipe a/ and the pipe b5 to the horizontal water-pi pe b2, and the horizontal header p and vertical header r are connected to short pipes c4 and c5, which project from the upper part of the main supporting-pipes, the pipe c from the bend d2 and the pipe c5 from the central part of the pipe cZ of the steam-space of the generator.

From the form of the steam-generating tubes and the manner in which they are connected .with the headers and the headers with the main supporting-pipes, it will be seen that all parts may independently expand and contract without imparting severe strains to any of the connections, as the right-angle bends of the generating-tubes provide for their individual expansion without interference, andthe free ends of the headers provide for variable expansion of the tubes, Src., of each section lwithout interference from other sections; also, that the water has free circulation in all the independent single-bend generating-tubes entering any of the water-pipes, as the pipe b at bs, and passing from the waterpipes b b3 through the lower headers, bent tubes,and upper headers to the stand-pipes a a3, and the steam, as it forms in the tubes, ascending to the steam-space pipes c c c2 c3, and from the rear pipe, c2, passes into the superheating-pipes c c7 and their connecting-pipe as, from which it is taken by pipe'c. At one end the pipes 0G c7 are connected to the inner side of the pipe c2, and attheir other endssi-'mlply connected together, so that they-are free to expand without applying strains to other parts of the generator.

The arrows indicate the direction of the products of combustion.

In the modication shown at Figs. 5 and 6 thesections have their bent tubes t t arranged in vertical planes,'the'ir headers u being secured to the inner side of the rear horizontal water-pipe, b2, with their free closed ends resting on a projection at the rear of the bridgewall ofthe furnace, and their other headers, u', which are vertical, being secured to the under side of the front steam-pipe, c.

rlhe steam-generating tubes,instead of being made up of two straight pieces of tube and a simple bend,may be made of a single piece of tube bent at or about a right angle.

Steam -generators constructed as here set forth may be provided with water jackets composed of coils of pipes, as described andf claimed in my before-mentioned application.

Having now described my invention, what I claim, and desire to secure by Letters Patent, 1s-

l. In a tubular steam-generator, the combination, with the main supporting-frame consisting of stand-pipes and horizontal connecting-pipes, of steam-generating tubes having a single bend, one part extending about horizontally from the front upper part of the main frame toward the rear, and the other part of the tubes extending vertically and downward to the rear lower part of the main frame, substantially as and for the purpose set forth.

2. rlhe combination, with the main supporting-frame of a tubular steam-generator comprising four corner` standpipes and upper steam and lower water horizontal connectingpipes, of sections of tubes composed of single- IOO bend tubes and connecting-headers at their IIO rear chamber formed by a partition extending nearly to the bottom of the generator, and sections of right-angle tubes transversely arranged in said rear chamber and also 'conne'cted to the rear end of the main frame, subg 'stantially as and for the purpose set forth.

4. In a tubular steam-generator, in combination, the main supporting-frame comprising stand-pipes a a a2 a3, horizontal water-pipes'fb b b2 b3, and steam-pipes c c c2 c3, and thesteamsuperheating pipes c6 c7, arranged between theY 4 pipes c c c2 c, and connected at one of their -endsto ,the rear pipe, e2, and'at their other ends to the short pipe o8, substantially as set forth.

5. In a tubular steam-generator, in combination, the main supporting-frame comprising the standpipes a a a2 c3 and horizontal connecting-pipes b b bZ 1f and c c c2 03, the singlebend steam-generating tubes e f g and e'f f', the headers h and t' and h i', the right and left threaded connecting-pieces j j', and furnace lc k', substantially as set forth.

6. In a tubular steam-generator, in combination, the main supporting-frame comprising the stand-pipes ft a a2@a and horizontal connecting-pipes b b b2 b, and c c c2 c3, the single-bend steam-generating tubes e fg and ef g', the headers h and z' and h 17, the right and left threaded connecting-pieces j j', the rear chamber, n, pipes bJt and b5, projecting from the lower part of the main frame, pipes afct, projecting from the upper part of the main frame, and sections of rightangled tubes composed of headers p r and p r', tubes o s and o s', and bends q and q', and furnace k k, substantially as set forth.

7. In a tubular steam-generator, in combination7 the main supporting-frame comprising the stand-pipes a a a2 a3 and horizontal connecting-pipes b b b2 b3 and c c c2 c3, the rear chamber, n, pipes b* and b5, projecting from the lower part of the main frame, pipes a* and a5, projecting from the upper parts of the main frame, and sections of right-angled tubes com posed of headers p 1- and p r', tubes o s and o s', and bends q and q', and the furnace k k, substantially as set forth.

In testimony whereof Ihave hereunto set my hand, at New York, county and State 0f New York, this 7th day of August, 1885.

PATRICK REILLY.

IVitnesses:

H. D, WILLIAMS, ALFRED SHEDLOCK. 

